regex/mlx5: support combined rule file

regex/mlx5: support combined rule file

The rof file holds programming instructions for
a given HW version.
In order to support future generation of HW it
was decided that the rof file will hold number
of rule configurations, and the driver will use
the one that matches the HW version.

In current code we force sync after each write block.
This has impact on performance.

The solution is to move the sync to the end of the
entire programming sequence.

Signed-off-by: Ori Kam <orika@nvidia.com>